Artifact f6654defd2560be8624d72f40a255e91eb2c411d610f6ce90f86dcb9b03f7b84:
- File
src/runtime/lookup-asm/lookup-asm-x86-elf.S
— part of check-in
[0b441e52d6]
at
2024-02-26 20:32:38
on branch trunk
— Use <cet.h> and _CET_ENDBR macro
This only uses endbr32/endbr64 when actually needed and emits the
necessary .note.gnu.property. (user: js, size: 2459) [annotate] [blame] [check-ins using]
/* * Copyright (c) 2008-2024 Jonathan Schleifer <js@nil.im> * * All rights reserved. * * This file is part of ObjFW. It may be distributed under the terms of the * Q Public License 1.0, which can be found in the file LICENSE.QPL included in * the packaging of this file. * * Alternatively, it may be distributed under the terms of the GNU General * Public License, either version 2 or 3, which can be found in the file * LICENSE.GPLv2 or LICENSE.GPLv3 respectively included in the packaging of this * file. */ #include "config.h" #include "platform.h" #ifdef HAVE_CET_H # include <cet.h> #else # define _CET_ENDBR #endif .globl objc_msg_lookup .globl objc_msg_lookup_stret .globl objc_msg_lookup_super .globl objc_msg_lookup_super_stret .section .text .macro GENERATE_LOOKUP name notFound \name: _CET_ENDBR movl 4(%esp), %edx testl %edx, %edx jz .LreturnNilMethod testb $1, %dl jnz .LtaggedPointer_\name movl (%edx), %edx movl 32(%edx), %edx .Lmain_\name: movl 8(%esp), %eax #ifdef OF_SELUID24 movzbl 2(%eax), %ecx movl (%edx,%ecx,4), %edx #endif movzbl 1(%eax), %ecx movl (%edx,%ecx,4), %edx movzbl (%eax), %ecx movl (%edx,%ecx,4), %eax testl %eax, %eax jz 0f ret 0: call .LgetEIP addl $_GLOBAL_OFFSET_TABLE_, %eax movl \notFound@GOT(%eax), %eax jmp *%eax .LtaggedPointer_\name: call .LgetEIP addl $_GLOBAL_OFFSET_TABLE_, %eax movl objc_taggedPointerSecret@GOT(%eax), %ecx xorl (%ecx), %edx andb $0xE, %dl movzbl %dl, %edx movl objc_taggedPointerClasses@GOT(%eax), %eax movl (%eax,%edx,2), %edx movl 32(%edx), %edx jmp .Lmain_\name .type \name, %function .size \name, .-\name .endm .macro GENERATE_LOOKUP_SUPER name lookup \name: _CET_ENDBR movl 4(%esp), %edx movl (%edx), %eax testl %eax, %eax jz .LreturnNilMethod movl %eax, 4(%esp) mov 4(%edx), %edx mov 32(%edx), %edx jmp .Lmain_\lookup .type \name, %function .size \name, .-\name .endm GENERATE_LOOKUP objc_msg_lookup objc_methodNotFound GENERATE_LOOKUP objc_msg_lookup_stret objc_methodNotFound_stret GENERATE_LOOKUP_SUPER objc_msg_lookup_super objc_msg_lookup GENERATE_LOOKUP_SUPER objc_msg_lookup_super_stret objc_msg_lookup_stret .LreturnNilMethod: call .LgetEIP addl $_GLOBAL_OFFSET_TABLE_, %eax leal .LnilMethod@GOTOFF(%eax), %eax ret .LnilMethod: xorl %eax, %eax ret .LgetEIP: movl (%esp), %eax ret #if defined(OF_LINUX) || defined(OF_HAIKU) || defined(OF_HURD) .section .note.GNU-stack, "", %progbits #endif